EUVD-2026-81325
GHSA-r23j-xxqv-w996
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Crafted 802.11 FILS authentication frames require Wi-Fi radio proximity (AV:A, not AV:N); unauthenticated pre-association (PR:N/UI:N); transient availability-only impact (A:H, C:N/I:N).
Primary rating from Vendor (qualcomm).
CVSS VectorVendor: qualcomm
Lifecycle Timeline
3DescriptionCVE.org
Transient DOS when processing authentication frames with invalid FILS information element header lengths.
AnalysisAI
Transient denial of service in the Qualcomm Snapdragon WLAN stack allows an attacker within Wi-Fi radio range to knock a device's wireless link offline by sending 802.11 authentication frames carrying FILS (Fast Initial Link Setup) information elements with deliberately malformed header lengths. Devices using affected Snapdragon Wi-Fi chipsets are exposed; exploitation is unauthenticated and requires no user interaction (CVSS:3.1/PR:N/UI:N), but it is bounded by radio proximity and the resulting outage is temporary, with no confidentiality or integrity impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target's Snapdragon WLAN stack to process 802.11 authentication frames containing FILS (Fast Initial Link Setup) information elements - i.e., a Wi-Fi-capable, associating/pre-association device within the attacker's radio range. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) rates this HIGH, but the score is driven entirely by availability impact - confidentiality and integrity are Not-affected, so this is a pure denial-of-service, not a memory-corruption code-execution flaw despite the CWE-126 'buffer over-read' classification and 'Buffer Overflow' tag. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Qualcomm has published vendor guidance in its September 2026 security bulletin (https://docs.qualcomm.com/product/publicresources/securitybulletin/september-2026-bulletin.html); no vendor-released patch version is confirmed in the supplied data, so the first step is to identify the exact Snapdragon chipset and WLAN firmware build in the bulletin's affected list and obtain the corresponding firmware fix through the device OEM, since Snapdragon firmware is distributed via OEM BSP and carrier/device update channels rather than directly by Qualcomm - track OEM security bulletins and MDM/OTA update pipelines for the corrected WLAN firmware. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all devices using affected Qualcomm Snapdragon Wi-Fi chipsets (e.g., smartphones, laptops, IoT endpoints) and verify whether FILS (802.11ai) is enabled in wireless configurations; where feasible, disable FILS on access points and clients to eliminate the attack vector. …
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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